<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">

  <title>Document</title>

  <style>
    
  </style>
</head>
<body>
  
  <div id="app">
    <ul>
      <li v-for="(item,index) in list" :key="item.id">{{item.num}}
        <button @click="del(item.id)">删除</button>
      </li>
    </ul>
    <button @click="add">生成</button>
  </div>
  <script src="../vue.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        list: [
          {id:0,num:1},
          {id:1,num:5},
          {id:2,num:3},
          {id:3,num:9},
          {id:4,num:7},
          {id:5,num:8},
          {id:6,num:6},
          {id:7,num:2},
          {id:8,num:4},
          {id:9,num:10}
        ]
      },
      methods: {
        del (id) {
          this.list = this.list.filter(item => item.id !== id)
        },

        add () {
          const num = Math.floor(Math.random() * 20 + 1)
          this.list.push({
            id: Date.now(),
            num: num
          })
        }
      }
    })

  </script>


</body>
</html>